As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN DOOR: WHEN YOU LIFT EITHER THE OUTSIDE HANDLE OR INSIDE HANDLE ON THE DOOR, NORMALLY THE DOOR JUST SMOOTHLY OPENS NOW IT TAKES A TUG ON THE HANDLE FROM THE OUTSIDE OR A PUSH ON THE DOOR WHEN YOUR INSIDE THE AIRCRAFT TO GET THE DOOR TO OPEN.///SIGN-OFF///FOUND STICKY SUBSTANCE ON DOOR SEAL, CLEANED DOOR SEAL AND OPS CHECKED OPENING AND CLOSING OF DOOR. OPS CHECKS GOOD. REF: CE-680A MM 52-10-00